Flathead tracking

Well I have this far fetched fantasy of tracking these big flatheads I catch every year in june in a kansas lake. I catch them every year in the exact same rocky spawning area around the same time. I have tried sitting up night after night tryin different spots to find them after that time frame and I have given up. I dont know where the hell they go!? I was looking for a cheap tracking device for fish and the guy I talked with wanted like 2,500 for his cheapest system but said if I could find someone in the area with the actual tracking unit I could just buy a couple transmitters. I dont know, maybe I just take it to the extreme. Anyone else have any ideas??? or a tracking unit:smile2: